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The evolution of hadron spectra in the modified leading logarithm approximation

  • S. Albino
  • B. A. Kniehl
  • G. Kramer
  • W. Ochs
theoretical physics

Abstract.

We perform fits of \(\Lambda_{\mathrm {QCD}}\) and the gluon fragmentation function D(x,Q) at initial scale \(Q_0 \gg\Lambda_{\mathrm {QCD}}\) to charged light hadron momentum spectra data by evolving in the modified leading logarithm approximation. Without additional assumptions, we achieve a good description of the available data for \(\xi = \ln(1/x)\) up to and around the Gaussian peak, and values of \(\Lambda_{\mathrm {QCD}}\) acceptably close to those in the literature. In particular, we find that this procedure describes the position of the peak, and, in contrast to the limiting spectrum, also the normalization.

Keywords

Additional Assumption Good Description Fragmentation Function Spectrum Data Gaussian Peak 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin/Heidelberg 2004

Authors and Affiliations

  • S. Albino
    • 1
  • B. A. Kniehl
    • 1
  • G. Kramer
    • 1
  • W. Ochs
    • 2
  1. 1.Institut für Theoretische PhysikUniversität HamburgHamburgGermany
  2. 2.Max-Planck-Institut für Physik (Werner-Heisenberg-Institut)MünchenGermany

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